Method for controlling toxic and harmful substances in blasting driving channel to be prevented from exceeding standard

The invention discloses a method for controlling toxic and harmful substances in a blasting driving channel to be prevented from exceeding the standard. The method includes the following steps that (1) a plurality of drainage net pipes are arranged on a driving face in parallel and are sequentially connected with a flow measurement device, a collecting pipe, a U-shaped filtering water pipe, a drainage header pipe and an exhaust fan, wherein the multiple drainage net pipes are connected with the collecting pipe through one multi-way pipe, and the multi-way pipe is perpendicular to the collecting pipe; and (2) after blasting driving operation is carried out on the driving face, the exhaust fan is started, air is fed to the driving face, and the toxic and harmful substances flow into the collecting pipe through the drainage net pipes and then are discharged out of the ground through the drainage header pipe or enter an air return system. According to the method, the pumping manner is adopted for directly dischar